Triple unit with sediment filter, 10 micron carbon block filter, and UV lamp. The UV20-3 combines ultraviolet filtration with a five micron sediment filter & a ten micron carbon block filter. We use these units extensively in rainwater systems with excellent results. This unit provides bacteria protection, removes sediment, and reduces chemicals, while improving taste and odor. It is suitable for most standard whole house water filtration needs. Maximum Flow (gallons/min.): 8 Replacement Lamp Size #: 20 Lamp Power Usage: 22 watts Replacement sleeve #: 20 Voltage: 120 volt 60 Hz. Height: 25" (64 cm) Width: 16" (41 cm) Depth: 5.5" (14 cm) Weight: 29 lbs (13.2 kg) Port Size: 3/4" Lamp Dosage No less than 16,000 μW-s/cm2 or greater Filter Cartridge Replacement: Five micron sediment, 10 micron carbon block, & UV lamp. Power: Standard Voltage: 120 volt 60 Hz